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0. E. VAN WORMER.

Y DOOR BELL.

AWE/vi R: a a t/M 521% $44 v lg'la/l 44 ATTORNEYS WITAESSES: 7 4w? @W Wa Y NITED STATES- PATENT OFFICE.

OHAUNCEY E. VAN WORMER, OF SYRACUSE, NEW YORK, ASSIGNOR OF TWO- THIRDSTO CHARLES S. PHARIS AND CHARLES H. KNAPP, OF SAME PLACE.

DOOR-BELL.

SPECIFICATION forming part of Letters Patent No. 492,070, dated February21, 1893. Application filed January 29, 1892. Serial No. 419.635. (Nomodel.)

To all whom it may concern.-

Be it known that I, OHAUNoEY E. VAN WORMER, of Syracuse,in the county ofOnondaga, in the State of New York, have invented new and usefulImprovements in Door- Bells, of which the following, taken in connectionwith the accompanying drawings, is a full, clear, and exact description.

This invention consists essentially of a spring-actuated door-bell Whosespring is wound up automatically with the movement of the door. And theinvention also consists in certain novel features of the constructionand combination of the component parts of said door-bell as hereinafterfully described and specifically set forth in the claims.

In the annexed drawings Figure 1 is a view of the inner side of a doorequipped with a door-bell embodying my invention, Fig. 2 is a transversesection on line 0c, 00, in Fig. 1, Fig. 3 is an enlarged detached faceview of the bell ringing mechanism, Fig. 4 is a plan view of the bellmechanism with the bell in central cross-section. Fig. 5 is a face viewof the mechanism which is back of the line y, 'y, in Fig. 4, and Fig. 6is a detail View of the detents which limit the movement of the bellringing mechanism.

Similar letters of reference indicate corresponding parts.

D- represents the door, and B- the bell or gong which is mounted on thepost -P projecting from the front plate a of a frame composed inaddition to said plate, of another plate --ct' parallel therewith andsecured thereto by posts Cb", a". Said frame is firmly secured to thedoor as represented in Fig. 4 of the drawings. To the plates a-a ispivoted a shaft -b on which is wound and secured at one end a coilspring-c, the opposite end of which is fastened to one of the posts a". Tosaid shaft is also rigidly secured a pinion dwith which meshes a toothedquadrant I mounted oscillatory on one of the posts a". On this post isalso mounted a rock-arm, -C which by means of a spring e is heldyieldingly resting against a stop efixed to the p1ate--aas shown in Fig.5 of the drawings. The quadrant being there shown in a differentposition than in Fig. 3 for the purpose of illustrating the position ofsaid sto Ill the path of one end of the rock-arm is a lug -f fixed tothe quadrant -I- so that the movement of the former in one directioncarries with it the latter. To the opposite end of the rock-arm isattached a chain or rod gwhich extends to the casing D of the door andis firmly secured thereto, so that in opening the door the said chain orrod is subjected to a draft which swings the rock arm on-its axis andcauses the same to turn the quadrant -I which imparts rotary motion tothe pinion -d and thereby winds up the spring -c. In order to increasethe aforesaid draft on the chain or rod g- I attach to the door near theedge thereof a pulley h between which and the door the said chain or rodpasses. To allow the chain g-- to be adjusted to different Widths ofdoors or to the requisite tension, I attach said chain to thedoor-casing by means of a clamping plate iplaced astride the chain andsecured to the casing by screws passing through the end portions of saidplate.

Parallel with the shaft -b is a counter shaft --b pivoted to the platesaa and to this counter shaft are fastened the pinion -j and escape-wheelk. A gear wheel L fastened to the shaft -ameshes with the pinion -j andthus transmits motion to the escape wheel. A verge -J pivoted to theplates aa' engages the escape-wheel and has affixed to it thebell-hammer H. The rotation of the escape wheel imparts an oscillatorymotion to the verge J-- and thereby causes the hammer -H to sound thebell -B. To control this action of the bell-hammer I attach to oppositesides of the escape-wheel 7c-, lugs ZZ-- and on one of the posts aI'hang the detents tt which are disposed at opposite sides of theescape-wheel and are firmly secured to the stem n of the push button -0arranged on the opposite side of the door as shown in Figs. 4 and 6 ofthe drawings, which show the push button in its depressed position andnormal position respectively. The spring n'- holds the push-button stemin its normal position.

The log Z- on one side of the escape is in a different position in thecircumference of the wheel than the lug on the opposite side thereof,and when only onelug is employed on each side of the wheel said lugs aredisposed at opposite sides of the center of the wheel as shown and arein the paths of the detents -tt which latter are a sufficient distanceapart to allow them to move laterally out of engagement with the lugs.The engagement of either detent with the lug on the adjacent side of theescape wheel arrests the movement of said wheel and thereby restrainsthe hammer H in its dormant position. The push button normally holds oneof the detents engaged as aforesaid, and by pushing on said button saiddetent is thrown out of engagement with the lug and consequently theescape wheel is allowed to turn and cause the hammer H to sound thebell. In case the operator maintains the pressure on the push-button theother lug -Z-- comes in contact with the second detentt and thus theescape wheel is arrested in its motion, and by releasing the push buttonthe first lug comes in contact with the first detent and the ratchetwheel is held dormant during the normal position of the push-button.

The diameter of the quadrant is so much greater than that of the pinion-clas to cause one movement of the door to its open position, to turnthe pinion a sufficient number of times to effectually wind up thespring -c. The danger of excessively straining the spring is obviated bythe employment of the rock-arm O operating independently of the quadrant-I- and incapable of moving the latterbeyond a certain degree.

Having described my invention, what I claim as new, and desire to secureby Letters Patent, is-

1. The combination, with the door and doorcasing, of a bell andspring-actuated bellhammer attached to the inside of the door, a detentrestraining the motion of the bellham mer,a push-button extendingthrough the door from the outside thereof and adapted to throw thedetent out of its restraining position, mechanism for winding theaforesaid actuating spring, a sheave or guide attached to the door nearthe hinged edge thereof, and a chain or cord connected at one end tosaid winding-mechanism and passing with its opposite end between thedoor and sheave or guide and fastened to the adjacent door-casingsubstantially as set forth.

2. In combination with the bell, its hammer and spring-actuated shaftimparting motion to said hammer, a pinion fixed to said shaft, aquadrant engaging said pinion, a rook-arm movable independent to thequadrant, a lug projecting from the quadrant and in the path of therock-arm, and a chain or rod connecting the rock-arm to the door-casing,substantially as described and shown.

In testimony whereof I have hereunto signed my name this 26th day ofJanuary, 1892. CHAUNCEY E. VAN WORMER. [L \Vitnesses:

E. LAASS, MARK W. DEWEY.

